To disable 5G connection tap 4G/3G/2G (auto connect), 3G/2G (auto connect) or 3G only. From the home screen, swipe down to access settings. … To enable 5G connection, tap 5G/4G/3G/2G (auto connect). To disable 5G connection tap 4G/3G/2G (auto connect), 3G/2G (auto connect) or 3G only.